Doping Effect of Transition Metal Ions on Magnetic and Optical Properties of EuO-Al2O3-SiO2 Glass

We previously reported Faraday rotation of EuO-Al2O3-SiO2 glass operating in the visible region. At that time, magnetic/magnetooptic improvement of EuO-Al2O3-SiO2 glasses could be expected by incorporating divalent transition metal ions M2+ such as Co2+ and Fe2+ ions. In this paper, we report magnetic and optical properties of 70EuAl2O4-30SiO2 glasses doped with Co2+ or Fe2+ ions. Faraday rotation effects of these glasses are also presented. Conclusively, it is revealed that the ferromagnetic couplings of the dimmer Eu2+ ↑ -Fe2+ ↑ and the trimer Eu2+ ↑ -Co2+ ↑ -Eu2+ ↑ formed in the glasses enhance Faraday Rotation effects.